Powder molding press

Abstract

A powder molding press, for compression-molding a raw powder between a pair of metal molds coupled to a pair of metal mold securing devices. At a preset spacing, the movement of the metal mold securing devices toward each other is electrically detected in order to cut off the driving means advancing the metal mold securing devices. In addition, the movement of the metal mold securing device is mechanically stopped by means of stoppers, with the result that the final position of the metal molds can be precisely regulated.

I claim: 
     
       1. A compression-molding press comprising: a machine frame;   a first metal mold securing device slideably secured to said machine frame;   a second metal mold securing device secured to said machine frame;   a driving means for slideably advancing said first metal mold securing device towards said second metal mold securing device;   a first metal mold coupled to said first metal mold securing device;   a second metal mold coupled to said second metal mold securing device;   stopper means, positioned between said first and second metal mold securing devices, and impinging upon one of said metal mold securing devices when said first metal mold securing device is advanced a predetermined distance toward said second metal mold securing device;   detecting means positioned between said stopper means and said one of said metal mold securing devices for detecting impingement of said stopper means upon said on of said metal mold securing devices; and   a means, included in said detecting means, for cutting off said driving means advancing said first metal mold securing device towards said second metal mold securing device, upon detection of impingement by said detecting means, thereby preventing a strong driving force acting on said impinging stopper means and said one of said metal mold securing devices, saving said stopper means and said one of said metal mold securing devices from breakage and deformation.   
     
     
       2. A compression-molding press as described in claim 1 wherein said detecting means is attached to said first metal mold securing device 
     
     
       3. A compression-molding press as described in claim 1 wherein said stopper means is fixedly secured to said machine frame. 
     
     
       4. A compression-molding press as described in claim 1 wherein said detecting means electrically detects said impingement of said stopper means upon said one of said metal mold securing devices. 
     
     
       5. A compression-molding press as described in claim 1 wherein the diameter of the impinging surface of said stopper means and said one of said metal mold securing devices is larger than the diameter of said first and second metal molds. 
     
     
       6. A compression-molding press as desccribed in claim 1 wherein said stopper means is secured at a suitable location relative to said first and second metal mold securing devices and along side one of said first and second metal molds. 
     
     
       7. A compression-molding press as described in claim 1 wherein said stopper means includes a height adjusting means. 
     
     
       8. A compression-molding press as described in claim 7 wherein the height adjusting means of said stopper means includes a screw thread formed on the top part of said stopper means and regulator collar means locked on the screw threads. 
     
     
       9. A compression-molding press as described in claim 8 wherein the height adjusting means of said stopper means further includes a disk mounted on said regulator collar means. 
     
     
       10. A compression-molding press as described in claim 7 wherein said stopper means has a graduated scale means for regulating the height of said height adjusting means.